class cCar:
    name=None
    color=None
    _speed_=0
    _oilNum=0
    x=0
    y=0
    def _init_(self)->None:
        print("init")
    def addOil(self,onum):
        self._oilNum=self._oilNum+onum
    def show(self):
        print(self.name,self.color,self._speed_,self._oilNum)
car1=cCar()
car1.show()
car1.addOil(40)
